Optical disk drive and information processing apparatus

摘要

An optical disk drive is provided with an optical pickup (2) and an optical sensor (4). The optical pickup (2) is used for reading main information from an optical disk. The optical sensor (4) is located in the range of R17 to R23 and used for reading sub information from the optical disk. The optical sensor (4) is provided in relation to the center of a spindle motor used for rotating the optical disk and is located within 120° with respect to the radius that is 180° opposite to the radius along which the optical pickup (2) is movable.